hwmon: (nct6775) mask out bank number in nct6775_wmi_read_value()

The first call to nct6775_asuswmi_read() in nct6775_wmi_read_value()
had been passing the full bank+register number instead of just the
lower 8 bits.  It didn't end up actually causing problems because the
second argument of that function is a u8 anyway, but it seems
preferable to be explicit about it at the call site (and consistent
with the rest of the code).

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Fixes: 3fbbfc27 ("hwmon: (nct6775) Support access via Asus WMI")
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20211111025339.27520-1-zev@bewilderbeest.net


Signed-off-by: Guenter Roeck <linux@roeck-us.net>